package com.liu.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.liu.reggie.common.BaseContext;
import com.liu.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * @author liustart
 * @create 2022-07-24 16:44
 */
@WebFilter(filterName ="loginFilter",urlPatterns = "/*")
@Slf4j
public class LoginFilter implements Filter {
    public static  final AntPathMatcher PATH_MATCHER=new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String requestURI = request.getRequestURI();// /backend/index.html
        log.info("拦截到请求：{}",requestURI);
        String[] urls=new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/login",
                "/user/sendMsg",
                "/doc.html",
                "/webjars/**",
                "/swagger-resources",
                "/v2/api-docs"

        };
        Boolean aBoolean = match(urls, request.getRequestURI());
        if (aBoolean){
            filterChain.doFilter(request,response);
            return;
        }
        if (request.getSession().getAttribute("employee")!=null){
            Long empId = (Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(empId);
            filterChain.doFilter(request,response);
            return;
        }
        if (request.getSession().getAttribute("user")!=null){
            Long userId = (Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userId);
            filterChain.doFilter(request,response);
            return;
        }
        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));

        return;

    }

    public Boolean match(String[] urls,String requestUri){
        for (String url : urls) {
            if (PATH_MATCHER.match(url,requestUri)){
                return true;
            }
        }
        return false;
    }
}
